Object #8 (Table 'client'): Invalid primary key property.

I have this error that keeps poping up when I try to either browse or modify the table 'client'. I can't understand the error because there is no index for this table nor is there any reference to indexes for this table in the database table (they were all manually deleted after a crash corrupted the indexes).

I don't want to loose my data and I can't seem to find a solution to either save the table or copy it's data to another table (plus FoxPro keeps asking me to VALIDATE DATABASE which I do but I get the same error message and nothing else changes).

Thanks in advance, Stephane.